Loop compensation

Hello

My customer is evaluating their board which use LTC1778 for new project.

( They already use this for another project before.)

Target Spec. is

* FA application 

*28V+/- 2V in

*5V 6.3A out

*fSW=970kHz

*Forced CCM mode

They set  Cc1=1000pF, Rc=20kohm, Cc2=22pF  in the data sheet  page24 .

They had chosen these with cut & try. so they are not confident with.. ( Also, they have start up issue now....)

My question is:

1)  Are  these  value  Cc1=1000pF, Rc=20kohm, Cc2=22pF appropreate for their spec?

2)  By the way, I want to use LT Power CAD II for LTC1778 stability evaluation. But unfortunately , LTC1778 is not supported. 

Could you advise which replacement part (LT Power CAD II is supported) could be used  for loop compensation evaluation for LTC1778?

I hope to this thread find you well.

Best Regards